Zobrazeno 1 - 10
of 29
pro vyhledávání: '"F. D. Medina"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 13973-13986 (2023)
The International Reference Ionosphere (IRI) is a widely used empirical ionospheric model based on observations from a worldwide network of ionospheric stations. Therefore, it would be reasonable to expect it to capture long-term changes in key ionos
Externí odkaz:
https://doaj.org/article/4ae7e062f93b4467ae31d57b8946f1ab
Autor:
A. G. Elias, C. R. Martinis, B. F. de Haro Barbas, F. D. Medina, B. S. Zossi, M. Fagre, T. Duran
Publikováno v:
Earth and Planetary Physics, Vol 7, Iss 5, Pp 540-547 (2023)
Four extreme ultraviolet (EUV) solar radiation proxies (Magnesium II core-to-wing ratio (MgII), Lyman α flux (Fα), 10.7-cm solar radio flux (F10.7), and sunspot number (Rz)) were analyzed during the last four consecutive solar activity minima to in
Externí odkaz:
https://doaj.org/article/62abac3cada246f78186ab7901e9e198
Publikováno v:
Applied Physics Letters. 83:1947-1949
α-Ga2S3 and α-Ga2S3:Fe2+ single crystals were grown by the two-zone sublimation method. The optical energy gaps of α-Ga2S3 and α-Ga2S3:Fe2+ at 10 K were found to be 3.440 and 3.392 eV, respectively. From the absorption spectra of α-Ga2S3:Fe2+, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::468177e92ae81318bdfe3d355bb043f9
https://doi.org/10.1063/1.1609254
https://doi.org/10.1063/1.1609254
The line shape and zero-phonon line of the luminescence spectrum from zinc tungstate single crystals
Publikováno v:
Journal of Physics: Condensed Matter. 6:5373-5386
The blue and infrared (IR) bands of the photoluminescence spectra in the temperature range 11-430 K and excitation bands at 77 and 300 K of zinc tungstate single crystals have been studied. The line shape, obtained from the theory of lattice relaxati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab988af38aa5d3b033341ef82dca8d75
https://doi.org/10.1088/0953-8984/6/28/012
https://doi.org/10.1088/0953-8984/6/28/012
Autor:
F. D. Medina, R. K. Luo
Publikováno v:
Physical Review B. 42:3190-3193
Les deux frequences de reseau non nulles decroissent lineairement avec la temperature. Rien ne confirme le comportement anormal, observe anterieurement, de la compressibilite pres de la raie du melange. Indication par les parametres de Gruneisen d'un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31714ab8226ad35ad376c53c4af9015b
https://doi.org/10.1103/physrevb.42.3190
https://doi.org/10.1103/physrevb.42.3190
X-ray-diffraction, Raman, and photo-luminescence spectroscopic characterization of CVD diamond films
Publikováno v:
OSA Annual Meeting.
Diamond films have received much attention as promising materials due to their unique combination of desirable electrical, optical and mechanical properties.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bffd1740861f4d21417332d066cffd75
https://doi.org/10.1364/oam.1993.wkk.10
https://doi.org/10.1364/oam.1993.wkk.10
Publikováno v:
Optical Society of America Annual Meeting.
The photoluminescence spectra of ZnWO4 in the near infrared region were obtained in the temperature range from 10 to 400 K. Zero-phonon lines and phonon replicas were observed. The temperature dependences of the shapes, widths, positions, and intensi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b13f88770b4cb84d8a7568ed50af6ad
https://doi.org/10.1364/oam.1992.ft1
https://doi.org/10.1364/oam.1992.ft1
Publikováno v:
Optical Society of America Annual Meeting.
The temperature dependence of polarized Raman spectra from single crystals of ZnWO4, which is a promising scintillation material, are reported. Among the eighteen Raman-active modes, all six internal vibrational modes resulting from the WO6 octahedra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::690c83e451f9e79062b112b7d3bc9c8c
https://doi.org/10.1364/oam.1991.wp2
https://doi.org/10.1364/oam.1991.wp2
Publikováno v:
Optical Society of America Annual Meeting.
Zinc tungstate (ZnWO4) has shown promise as a new scintillation material. Earlier photoluminescence studies were restricted to room temperature. In the present work, the photoluminescence from single crystals of ZnWO4 is studied in the temperature ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6900d8ec27e3d516627fdcb5b797fcdf
https://doi.org/10.1364/oam.1990.fff7
https://doi.org/10.1364/oam.1990.fff7
Autor:
F. D. Medina, C. L. Nye
Publikováno v:
The Journal of Chemical Physics. 87:6890-6894
The Raman spectrum of ammonia solid I in the lattice and intramolecular regions has been studied at temperatures between 93.6 and 213.5 K. The three most intense lines in the lattice region, one librational and two translational modes, have frequenci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7bec0dcf4c25845309a685f7087e802
https://doi.org/10.1063/1.453383
https://doi.org/10.1063/1.453383